diff --git a/src/main/java/dev/openfeature/sdk/Structure.java b/src/main/java/dev/openfeature/sdk/Structure.java
index bfb744998..4a52580a8 100644
--- a/src/main/java/dev/openfeature/sdk/Structure.java
+++ b/src/main/java/dev/openfeature/sdk/Structure.java
@@ -80,6 +80,8 @@ default Object convertValue(Value value) {
                 return numberValue.doubleValue();
             } else if (numberValue instanceof Integer) {
                 return numberValue.intValue();
+            } else if (numberValue instanceof Long) {
+                return numberValue.longValue();
             }
         }
 
diff --git a/src/test/java/dev/openfeature/sdk/StructureTest.java b/src/test/java/dev/openfeature/sdk/StructureTest.java
index 2a2406a54..e185e430b 100644
--- a/src/test/java/dev/openfeature/sdk/StructureTest.java
+++ b/src/test/java/dev/openfeature/sdk/StructureTest.java
@@ -116,4 +116,20 @@ void convertValueHandlesNullValue() {
         ImmutableStructure structure = new ImmutableStructure();
         assertNull(structure.convertValue(new Value((String) null)));
     }
+
+    @Test
+    void convertValueHandlesLongValue() {
+        long value = 4133980802L; // > Integer.MAX_VALUE
+        ImmutableStructure structure = new ImmutableStructure();
+        assertEquals(value, structure.convertValue(new Value(value)));
+    }
+
+    @Test
+    void asObjectMapHandlesLongValue() {
+        long value = 4133980802L;
+        Map<String, Value> map = new HashMap<>();
+        map.put("long", new Value(value));
+        ImmutableStructure structure = new ImmutableStructure(map);
+        assertEquals(value, structure.asObjectMap().get("long"));
+    }
 }